Ray-Ban Chad RX7217 8317. Discover Ray-Ban Eyeglasses Unisex CHAD OPTICS BIO-BASED - Transparent Light Brown frame Clear lenses polarized 52-22. Eyeglasses Ray - Ban RX7217 Chad, with Frame Squared in acetate, they offer a modern and decisive look. The brown color completes the structured design, perfect for those looking for a strong definition in their style. Recommended for round and oval faces, since they add corners and definition to the softer features. Ideal for men and women.